SecureWorks researcher Joe Stewart reverse-engineers a SpamThru Trojan and finds evidence of a well-heeled spam operation attempting to manipulate penny stocks. These images show the scammers at work.

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This chart shows the number of connections each control port received each day from the bots. The 2236 and 2238 variants gained a lot more infected users than any of the other variants, sometimes bringing up to 3 million connections to the control serv